May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers, Chef and Sub Array
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
September Mega Cook-Off 2018 Division 2
ATM Machine, Make a Permutation
February Challenge 2019 Division 2
Manhattan Rectangle, Deputy Chef, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars
April Cook-Off 2019 Division 2
Doubly Increasing Path, Random Game, Pied Piper vs Hooli, Making a Meal, Chef Learning Hungarian Algorithm
May Cook-Off 2019 Division 1
Misha and Nice Sets, Searching for a Biclique
Romania